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SECURITY ADVISORIES
Jul 29, 2021
UPDATE: PetitPotam NTLM Relay Attack
THE THREAT PetitPotam is a variant of the NTLM Relay attack discovered by security researcher Gilles Lionel. It is tracked as an authentication bypass vulnerability in Active Directory (Certificate Services); currently no CVE identifier has been assigned to this vulnerability. Proof of Concept (PoC) code released last week [1] relies on the Encrypting File System Remote (EFSRPC) protocol to…
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eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 1000+ organizations in 70+ countries from known and unknown cyber threats. Founded in 2001, the company’s mission is to hunt, investigate and stop cyber threats before they become business disrupting events.
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Jul 12, 2021
Tecala and eSentire Partner to Protect Enterprises across APAC from Business-Disrupting Cyber Attacks
Sydney, 12 July, 2021 - Tecala, Australia’s award-winning technology services and IT consulting provider, today announced it has chosen eSentire, the global Authority in Managed Detection and Response (MDR) cybersecurity services, as their exclusive MDR solution provider in Australia and New Zealand. This partnership will enable Tecala to augment its cybersecurity practice and offer enterprises…
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Security advisories — Feb 26, 2019

“Logjam” TLS Vulnerability

1 min read

A vulnerability recently exposed in Diffie-Hellman key exchange for TLS is potentially serious. However, it can be mitigated by doing the following on all of your TLS/SSL enabled systems:

Due to the nature of this vulnerability, we do not currently have signatures for detecting an exploit attempt in progress. However, we are actively researching methods of detection that can be rolled out to our sensors.

What We Know

The mechanics of this exploit require Man-in-the-Middle access to the network between the client and server, which makes the largest potential threat either internal users or outside users accessing an insecure network.

Affected known Protocols (TLS):

The below post on the Logjam attack outlines the configuration changes needed to generate a unique 2048-bit Diffie-Hellman group on common servers applications and will allow Server Test for HTTPS web servers.
https://weakdh.org/sysadmin.html (Site experiencing heavy load)

eSentire Defenses

eSentire has confirmed that our internal systems and the sensors deployed at client sites are protected against this threat. Current eSentire Continuous Vulnerability Service subscribers will receive in their next monthly report the details of any systems vulnerable to this attack.

Further Protection

How to further protect yourself from these (and other) emerging threats:

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